Answer:
18 protons and 22 neutrons (and 18 electrons if needed).
Explanation:
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Speed=distance/time
Distance=speed x time
Time=distance/speed
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Adenosine triphosphate (ATP) is referred to as the energy currency of the cell and is used to carry fuel for cellular work.
As you go down the metals column, their reactivity increases.. so the answer is the first one